1) Just before it executes, in onPreExecute we show the loading dialog.
2) After it is complete, in OnPostExecute, we call manageHttpResponse(String) with the response text. This method is declared as private in your Activity. We'll come to that later.
3) The doInBackground method is what contains all the magic. Note that it calls "getResponseBodyText" which we also haven't declared yet.

Extracting the string from HttpResponse

These methods can safely be added as private methods to your MyHttpPostRequest class

Conclusion

And there you have it. What you need to do is to change the url that is called (In the example http://www.enkeladress.com). Be aware of though, you should not try to modify any views in the doInBackground method of the MyHttpRequest class. That part is running in a separate thread, thus you need to use something like a Handler and Runnable to be able to change anything that is visible.